Travel on powder (3)
I believe the answer is:
ski
'travel on powder' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ski that I've seen before include "Mountain runner" , "Aid to movement on snow" , "Go downhill fast, perhaps?" , "Glide on snow with special footwear" , "Glide ove snow" .)